F350 Dually
Fleet Mechanic
Joined: Dec 2021
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What are you looking to find out?
I occasionally operate a 2021 6.2 XL DRW with 4.30 gearing. Its not my truck but a friends that I work for. In summary its the same as the SRW but with two extra wheels and better stability.
I occasionally operate a 2021 6.2 XL DRW with 4.30 gearing. Its not my truck but a friends that I work for. In summary its the same as the SRW but with two extra wheels and better stability.
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Fleet Mechanic
Joined: Nov 2019
Posts: 1,250
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From: Livingston Tx
What kinda RPM they run at 70-75 no load just truck with the 6 speed tranny. Im looking to change out my 3.73’s for 4.30’s
Fleet Mechanic
Joined: Dec 2021
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At 65mph my 2013 turns 2000ish RPM. Im running 275/70R18 tires 33.5"
At 65mph the 2021 (10R140) turns roughly 2100RPM with 245/75R17 tires 31.5"
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Joined: Mar 2017
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From: Chaz
The base XL 2011-16 f250/350, and base xl 350 17+ have the same tire sizes as the drw and gear/transmission options you are looking for.
If a 10 speed the 7.3 250/350 could also have similar gearing and tires.
If its a 10 speed my stock drw 3.55 is at 2000 at 82mpg. Would be at 2097rpm if it has 3.73. You can do the math to figure it from there.
If a 10 speed the 7.3 250/350 could also have similar gearing and tires.
If its a 10 speed my stock drw 3.55 is at 2000 at 82mpg. Would be at 2097rpm if it has 3.73. You can do the math to figure it from there.
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Fleet Mechanic
Joined: Nov 2019
Posts: 1,250
Likes: 192
From: Livingston Tx
Was looking for actual setup because someone had told me to check on the RPM at highway speed with the 6 speed thinking it would be ridiculous high. I also want to do it for bigger tires as well.
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